I have reloaded for about 5 years now recently i have reloaded 308 win for my lr-308 i went to the range and shot about 10 rounds then on went click a misfire. Tried to extract it by pulling on the charging handle but couldn't. I had to use a rubber hammer and finally it came out. Tried it again and it happen about four more times rounds look fine. Maybe the neck was expanded to much ? Any advise will help.